I like it, but the background and foreground move too much in comparison to the girl.

 Love the cartoony proportions. Keep up the good work!

I love how well the foreground contrasts against the background. Great work. 

I love how you did the texture of the rock, ice and fire crystal. The triangular look is simplistic, yet cool. Great job overall.

Love it. I hope we get to see him in his bulky form some day.

 Wow. Great improvement over such short time. 

Cute. Looking forward to some more crab puns.

Cute gecko, but the placement is a bit odd. It might've been better to put it (or several geckos) crawling around on the text, as that's the first thing we see.

Very nice colour choice on the out-of-water one. However, the version with him in the water looks a bit odd; the portion of him that's wet is all the same colour. The water does change his skin color, but I'd suggest using a slightly opaque layer next time to get a more realistic look. 

 I really like the style, it looks like you used actual brush strokes as opposed to pixels. Well done! 

 Beautiful. The colors seem a bit off when you compare them to the colors seen in the actual movie, but I think this is actually an improvement. Well done.